US 11,747,530 B2
Optical baffle for a laser sensor for determining a liquid level
John Robert Budden, Thornton, CO (US); and Jeremy G. Dunne, Parker, CO (US)
Assigned to Laser Technology, Inc., Centennial, CO (US); and Kama-Tech (HK) Limited, Hong Kong (HK)
Filed by Laser Technology, Inc., Centennial, CO (US); and Kama-Tech (HK) Limited, Hong Kong (HK)
Filed on Jun. 8, 2021, as Appl. No. 17/341,831.
Prior Publication US 2022/0390655 A1, Dec. 8, 2022
Int. Cl. G01F 23/292 (2006.01); G02B 5/20 (2006.01)
CPC G02B 5/20 (2013.01) [G01F 23/2921 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A sensing system for determining a liquid level comprising:
a laser sensor having laser signal transmission and reception lenses thereof and operative to measure a time-of-flight distance of laser light between said laser sensor and said liquid level; and
a first optical baffle tube positioned adjacent either one of said laser signal transmission and reception lenses, said first optical baffle tube having a plurality of internal baffle rings operative to attenuate off-axis laser light emitted or received respectively from said either one of said laser signal transmission or reception lenses.